exam Maths Puzzle Numerical Ability

hi tutor can you please help me solve this problem like show me the steps and than its solution thank you.

xy-5y-2x+10=

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exam Other Question

Please help, it says to solve by completing the square.
x^2-3x+1=0
What I got for this was x-2 x+8 2-83
I am not so sure about my answer, please help! Thank You=) Which of the ordered pairs
(0, 0), (–2, 10), (–1, –5), (–3, 9)
are solutions for the equation y = 5x?